Very true! I’ve never studied any of the Slavic languages in any serious way, but from what I’ve read the Slavic and Baltic languages are perhaps the closest thing still in existence to proto-Indo-European as it evolved on the Pontic-Caspian steppes between modern-day Ukraine and western Kazakhstan. In then collided with Greek and was for a time overrun by Old Norse, with which it shares the patronymic naming system (-ov, -ova etc.). Glad to see I’m not the only person out there who nerds out on this stuff!